JPH0441755A - Knitting tool for warp knitting machine and its production - Google Patents

Abstract

PURPOSE:To obtain a knitting tool such as grand guide block for warp knitting machine, resistant to abrasion and rusting with knitting yarn, by forming a knitting element contacting or rubbing with a knitting yarn with a steel material having coating layer of a metal having high hardness or an amorphous metal composed mainly of a metal having high hardness. CONSTITUTION:For example, a guide piece 2 of a grand guide block 1 is produced of a steel material having a coating layer of a metal having high hardness or an amorphous metal composed mainly of a metal having high hardness (e.g. tantalum). A knitting tool for warp knitting machine produced by this process is resistant to abrasion with a knitting yarn contacting or rubbing the tool by the protective coating film having high toughness and bonding strength.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a knitting tool used in a warp knitting machine and a method for manufacturing the same.

[Conventional technology and its problems]

In warp knitting machines, several sets of sectional beams with warp threads wound around them are usually installed on the machine, and the warp threads are fed from these beams to the rows of knitting needles to perform knitting. In between, there is a separator to separate the warp threads and prevent them from coming together, a guide to guide the warp threads, a needle to form stitches, and in the case of a Raschel machine, which is a type of warp knitting machine, a knitting machine. Knitting tools such as a stitch comb to support the fabric when the needle rises, and sinkers to assist in stitch formation in tricot machines, are arranged with each function. Various knitting tools such as bendable Franchin guides are used.

The knitting elements of these knitting tools are constantly in contact with the knitting yarn during knitting and are rubbed, and when used for a long time.

Friction causes yarn grooves and the like to occur at yarn contact areas, causing fuzzing and yarn breakage during knitting, so these knitting elements are subjected to various surface treatments to increase their abrasion resistance.

For example, there is hard chrome plating, which has a hardness of Hvl.
It is not possible to obtain something better than OOO and the cost is high, and in the case of carburizing, the hardness is limited, and in the case of thin-walled items such as knitting tools, carburization progresses to the inside, impairing its toughness. The thermal spraying method requires large-scale equipment for implementation, which has the drawback of increasing costs.

In addition, the provision of a highly hard coating on the needle surface was introduced in the Japanese Patent Publication No. 61-
17518, the content of this article is to form a coating by ion blasting, and in particular, when trying to form a superhard material such as Ta (tantalum), the processing temperature must be lowered. It needs to be expensive, and is practically difficult to put into practical use.

The present invention aims to solve the above-mentioned drawbacks and provide a knitting tool that has excellent wear resistance and corrosion resistance, and also provides a method for practically forming a knitting tool with a more advanced coating. It is.

(c) Means for Solving the Problem] In the knitting tool for a warp knitting machine according to the first invention, the knitting element that contacts or makes friction with the silk thread is mainly composed of steel, and a part or the whole of the knitting element includes: It is characterized in that an amorphous metal layer made of or mainly composed of a high-hardness metal is formed.

Further, the second invention is characterized in that the amorphous metal layer is formed by sputtering.

[Effect]

According to the first invention, since an amorphous metal layer is formed on the surface of the knitting element constituting the knitting tool of the warp knitting machine, the atomic arrangement is not regular and crystal defects are uniformly distributed. The formation of a highly hard metal coating with no grain boundaries prevents abrasion caused by abrasion of the m-thread, and the coating has corrosion resistance.

It is also possible to prevent rusting due to the knitting yarn used.

According to the second invention, since the amorphous metal layer is formed by colliding atoms accelerated at a high potential, the metal layer is made of tantalum (Ta), which is a metal that has extremely high hardness and is difficult to evaporate thermally. Can be coated with other metals.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a ground guide block to be attached to a guide bar (not shown), and reference numeral 1 designates a holding portion, which is made of a material made of a tin alloy. 2 is a guide piece which is a knitting element made of steel.

An amorphous metal layer 3 is formed on the guide piece 2, as shown in an enlarged view of a portion of the guide piece 2 in FIG. This amorphous metal layer 3 can be formed, for example, by sputtering, and can be formed using not only tantalum (Ta) but also titanium (Ti).
, tungsten (W), zirconium (Zr), titanium-tungsten alloy (TiW), titanium nitride (TiN)
etc.

In addition, the stitch comb piece 4 in the stitch comb block shown in FIG. 3, the needle piece 5 in the needle block shown in FIG. 4, the separator piece 6 in the separate block shown in FIG. 5, and the tricot machine shown in FIG. The sinker piece 7 in the sinker block shown in FIG. A coating of crystalline metal layer is formed.

The amorphous metal layer can be formed by sputtering using a vacuum apparatus as shown in FIG.

In FIG. 8, while holding a large number of guide pieces 2 in the guide block shown in FIG. A method of forming a metal layer by sputtering is shown.

10 is a vacuum device, and 11 is a container having a structure capable of withstanding an atmospheric pressure of at least 10-'Torr. The container 11 is provided with an argon gas introduction part 12 and an exhaust hole 13, and a hanging member 14 is provided at the lower part of the hanging member 4.

A large number of guide pieces 2 are attached.

As shown in FIG. 9, the guide piece 2 is attached between a fixed rack 15 and a sliding rack 16 by being inserted into a pinion 17 that meshes with these racks.
is reciprocated in the direction of arrow 18, and the guide piece 2 inserted therein is reciprocated in the direction of arrow 19 as the pinion 17 reciprocates. As shown in FIG. 10, the guide piece 2 is inserted into a slit 18 provided in the pinion 17, and is fixed by an appropriate fixing means such as a screw, or by magnetizing the pinion 17 and applying magnetic force. Retained. The sliding rack 15 is supported on both sides by sliding receivers 20, 20.
5 and an eccentric wheel 22 rotated by a motor 21 are connected by a rod 23. Reference numeral 24 represents a support base constituting the cathode plate, and reference numeral 25 represents a tantalum (Ta)-based target material.

26 is a sputtering power supply, and an anode and a cathode terminal are connected to the cathode plate 24 and the container 11, respectively.

First, the pressure is reduced from the exhaust hole 13 with an air guide pump, and the container is filled with argon gas introduced from the introduction part 12.
1 to 10-'Torr or less, and the sputtering power supply to 20-'Torr or less.
When a DC voltage of 0.00 V is applied, a glow discharge is excited between the guide piece 2 and the target material 25. At this time, the argon gas ions collide with the target material 25, and constituent atoms of the target material 25 are ejected, and these atoms are attached to the surface of the guide piece 2 on the anode side. At this time, the guide piece 2 is forcibly rotated in a reciprocating manner by the reciprocating movement of the sliding rack 16, so that a coating of the amorphous metal layer is uniformly formed over the entire surface of the guide piece 2, including the hole 2a. will be done.

Since the amorphous metal layer 3 formed as described above is an immobile film that is rapidly cooled and solidified from a liquid metal, it has a chemically uniform composition free of segregation and the like.

By using such a tantalum-based target material 25, which is uniformly and minutely molded and has no pinholes,
A product with extremely high wear resistance and excellent corrosion resistance was obtained.The adhesion strength of the amorphous metal layer 3 according to this example reached as high as 9 Kg/■2, and extremely strong bonding properties were obtained. was gotten.

In addition, target materials include titanium (Ti), tungsten (W), zirconium (Zr), titanium-tungsten alloy (Ti
Of course, other high hardness metals such as W) type, titanium nitride (TiN) type, etc. can be used.

In addition, as a gas to replace the air in the container.

It goes without saying that other inert gases can be used instead of the argon gas mentioned in the examples.

〔Effect of the invention〕

According to claim (1), since the knitting element of the knitting tool for a warp knitting machine is covered with an amorphous metal layer having extremely high hardness, it does not wear out even if subjected to friction caused by the binding yarn during knitting. It also has the effect of preventing corrosion caused by the thread or the installation environment.

According to claim (2), since the adhesion strength of the amorphous metal layer can be extremely increased, a knitting tool is provided that has a protective film that has strong toughness and strong bonding properties that do not easily peel off due to external deformation force. It produces effects that can be obtained efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the ground guide block, and FIG. 2 is a perspective view of the ground guide block, and FIG.
3 is a perspective view of the stitch comb block; FIG. 4 is a perspective view of the needle block; FIG.
6 is a perspective view of a separate block, FIG. 6 is a perspective view of a sinker block, and FIG. 7 is a perspective view of a sinker block.
Figure 8 is a perspective view of the Franchin guide block, Figure 8 is a schematic cross-sectional view of the device showing a state in which sputtering is performed, and Figure 9 is a partial cross-section of the part where the guide piece is attached and reversed. FIG. 10 is a partially cross-sectional perspective view showing an enlarged part of FIG. 9. FIG. Explanation of symbols 2...Guide piece 3...Amorphous metal layer 4...
・Stitch comb piece 5... Needle piece 6... Separator piece 7... Sinker piece 8... Franchin guide piece 10... Vacuum device patent applicant Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) A knitting tool for a warp knitting machine in which knitting elements that come into contact with or friction with the knitting yarn are mainly made of steel, and some or all of the knitting elements are made of high-hardness metal or are made of high-hardness metal. A knitting tool for a warp knitting machine, characterized in that a coating is formed with an amorphous metal layer mainly made of metal. (2) The method for manufacturing a knitting tool for a warp knitting machine according to claim (1), wherein the amorphous metal layer is formed by sputtering.